Engine-valve construction.



H. E. OII'IN. ENGINE VALVE CONSTRUCTION.

APPLICATION FILED SEPT. 29, 1910.

Patented July 16, 1912.

u n In u HOWARD E. COFFIN, 0F DETROIT, MICHIGAN.

ENGINE-VALVE CONSTRUCTION.

Specification of Letters Patent. i

Application led September 29, 1910. Serial No. 584,425.

lowing is a specification, reference being had therein to the accompanylng drawings.

The invention relates to engine valve constructions and more. particularly to valves for eizplosion engines.

It is one of the objects of the invention to `facilitate the construction of the ,seat for the valve and to obtain accuracy in the lo-l cation ofthe ports thereof.

To this end the invention consists in the construction as hereinafter set forth.

vpreferably In the drawing the construction is represented in sectional perspective.

A is the casing of the engine, eitherof the single cylinder or multi-cylinder type.

B is adetachable head for the engine casing which is chambered to provide inlet and exhaust ports such as C, and a water jacket D. v.

E is a valve preferably a rotary valve which is seated upon the head B within the engine cylinder. This valve preferably'erbl gages counterbore F at the end of the engine cylinder which forms an. annular shoulder or bearing for the inner face of thev valve, vand v a peripheral packing ring G is preferably provided for forming a gastight joint.`

To obtain accuracy in the location of the ports for the valve sity of machining, the seatfor the valve is formed of a' sheet metal plate H arranged between the casing A and the head B. This plat-e is preferably stamped and is provided with ports I accurately lo- The porte` are arranged to register with ports J in the head B but the latter do not require machining as the timingof the valve is with respect to the portsI in the plate I-I. The inner face of the head B is however preferably machined to form a bearing for the plat-e I-I and if desired gaskets may be employed on one or both sides `of said plate to make a more perfect gas proofjoint. The necessity of this gasket is' not as great on account of the packing of the disk valve and to avoid the neces-4 by the peripheral ring E engaging the counterhore in the cylinder.

In addition to the advantage obtained by my construction in the perfect timing of the valvev` there is Ithe further advantage that any material desired may be used for the valve seat. Moreover the construction permits using a hardened ground plate and this when used will in a large measure be protect-cd from the heat of the lengine by the mass of the valve disk bearing thereagainst.

lVhat I claim as my invention is:

l. The combination with an engine cylinder of a detachable ported head therefor, a valve within the cylinder and a'stamped ported lining plate for said head defining the port area thereof.

2. The combination with an engine cv inder, of a ported head therefor, a valve .for controlling the ports of said head, and a sheet metal ported stamping clamped loetween and positioned by lsaid cylinderand head, and defining the port area of the latter.

8. The combination wilth an engine cyl- '.inder, of a detachable-head therefor, a rotary valve engaging a counterbore in the endof said cylinder, and a stamped plate clamped between said cylinder and head forming a seat for said valve and having accurately defined ports therein registering with the ports in said head.

4. The combination with the casing of a multi-cylinder engine, a detachable head therefor, valves engaging counterbores in the several cylinders of said casing, and a stamped plate clamped between said head and casing forming seats for said valves having accurately defined ports therein.

5. The combination with an engine cylinder, of a detachable head therefor, a rotary disk valve engaging a counterbore at the end of said cylinder, a peripheral packing for said valve,'and a ported stamped plate intermediate said head and the end of the cylinder forming a seat for said i valve.

In testimony whereofI afiix my signature in presence of two witnesses.

HOWARD E. COFFIN. Witnesses:

LENA M. CABLE, D. I-I. PAGE.

'Patented July 1c, 1912. 

